<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
    <style type="text/css">
    html{   
    width: 100%;   
    height: 100%;   
    overflow: hidden;   
    font-style: sans-serif;   
}   
body{   
    width: 100%;   
    height: 100%;   
    font-family: 'Open Sans',sans-serif;   
    margin: 0;   
    background:url('blackboard.jpg');
	background-size:100% 100%; 
	background-attachment:fixed;
}   
#login{   
    position: absolute;   
    top: 50%;   
    left:50%;   
    margin: -150px 0 0 -150px;   
    width: 300px;   
    height: 300px;   
}   
#login h1{   
    color: #fff;   
    text-shadow:0 0 10px;   
    letter-spacing: 1px;   
    text-align: center;   
}   
h1{   
    font-size: 2em;   
    margin: 0.67em 0;   
}   
input{   
    width: 278px;   
    height: 18px;   
    margin-bottom: 10px;   
    outline: none;   
    padding: 10px;   
    font-size: 13px;   
    color: #fff;   
    text-shadow:1px 1px 1px;   
    border-top: 1px solid #312E3D;   
    border-left: 1px solid #312E3D;   
    border-right: 1px solid #312E3D;   
    border-bottom: 1px solid #56536A;   
    border-radius: 4px;   
    background-color: #2D2D3F;   
}   
.but{   
    width: 300px;   
    min-height: 20px;   
    display: block;   
    background-color: #4a77d4;   
    border: 1px solid #3762bc;   
    color: #fff;   
    padding: 9px 14px;   
    font-size: 15px;   
    line-height: normal;   
    border-radius: 5px;   
    margin: 0;   
}  
    

    </style>
    <!-- <link rel="stylesheet" type="text/css" href="{{static_url('Login.css')}}"/> -->
    <script LANGUAGE="JavaScript">
        function openwin() {
        if(document.getElementById("w_flag").value=="1"){
            alert("用户不存在")
        }
        if(document.getElementById("w_flag").value=="2"){
            alert("用户名或密码错误")
        }
        if(document.getElementById("w_flag").value=="3"){
            alert("注册成功")
        }
        }
        </script>

</head>
<body onload="openwin()">
    <input type="hidden" value="{{w_flag}}" id="w_flag">


<div id="login">
    <h1>教学直播v1.0</h1>

<form method="post" action="/login">
    
    <input type="text" required="required" placeholder="用户名" name="username"></input>  
    <input type="password" required="required" placeholder="密码" name="password"></input> 
    
    <br>
    <button class="but" type="submit">登录</button>
</form>
<br>
<form action="register" method="get">
    <button class="but" type="submit">还没有账号? 去注册吧</button>
</form>

</div>
</body>
</html>
